Wiseco V-Twin Piston Kit - 1200 EVO Sportster 10.5:1 Comp — Harley-Davidson Electra Glide Classic, Sportster 883, Softail Custom (1984-1999)

Wiseco forged piston kit for 1200cc EVO Sportster with 10.5:1 compression ratio. Built from high-silicon, low-expansion aluminum for superior strength and heat transfer compared to cast pistons.

Features

• High-silicon, low-expansion aluminum forging
• Diamond-turned finish with no size variation
• Compatible with cast iron, chrome, nikasil, and boron composite bores
• CNC-machined for precise tolerances
• Oversized options available for cylinder resleeving

Specifications

• Brand: Wiseco
• Manufacturer Part #: K1685
• Compression Ratio: 10.5:1
• Engine Size: 1200cc EVO Sportster
• Length: 9.7 in
• Width: 5 in
• Height: 4.1 in
• Weight: 2.4 lbs

Fitment

Fits Harley-Davidson 1200cc EVO Sportster models requiring 10.5:1 compression ratio pistons.

Frequently Asked Questions

Will this piston kit work with my chrome-lined cylinders?

Yes. Wiseco pistons are compatible with cast iron, chrome, nikasil, and boron composite cylinder bores.

Do I need to get my cylinders bored for oversized pistons?

This is a standard 1200cc piston for unmodified cylinders. Wiseco offers oversized options if you're resleeving cast iron or boring existing cylinders.

What makes Wiseco pistons different from OEM Harley pistons?

Wiseco uses forged high-silicon aluminum instead of cast material, offering reduced weight, superior strength, and better heat transfer for improved longevity.

Can these be installed in any EVO Sportster?

These are sized for 1200cc EVO Sportster with 10.5:1 compression. Verify your engine displacement and desired compression ratio match before ordering.

Is professional installation required?

Piston installation requires engine removal, honing, and precise torque specifications. Professional machine shop installation is strongly recommended.